upgrade to Gateway API v1alpha2 (#4047)

Updates Contour to support Gateway API
v1alpha2 exclusively. Support for v1alpha1
is removed. Note that some new v1alpha2
functionality still remains to be implemented,
including ReferencePolicy.

Closes #3954.

Signed-off-by: Steve Kriss <krisss@vmware.com>

changelogs/unreleased/4047-skriss-major.md

@@ -0,0 +1,10 @@
+## Gateway API v1alpha2 support
+
+Contour now exclusively supports Gateway API v1alpha2, the latest available version.
+This version of Gateway API has a number of breaking changes, which are detailed in [the Gateway API changelog](https://github.com/kubernetes-sigs/gateway-api/blob/master/CHANGELOG.md).
+Contour currently supports a single `GatewayClass` and associated `Gateway`, and `HTTPRoutes` and `TLSRoutes` that attach to the `Gateway`. `TCPRoute` and `UDPRoute` are **not** supported.
+As of this writing, `ReferencePolicy`, a new v1alpha2 resource, has not yet been implemented in Contour, but we will look to add support for it shortly.
+For a list of other functionality that remains to be implemented, see Contour's [area/gateway-api](https://github.com/projectcontour/contour/labels/area%2Fgateway-api) label.
+
+As part of this change, support for Gateway API v1alpha1 has been dropped, and any v1alpha1 resources **will not** be automatically converted to v1alpha2 resources because the API has moved to a different API group (from `networking.x-k8s.io` to `gateway.networking.k8s.io`).
+

examples/contour/01-crds.yaml

@@ -3,7 +3,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    controller-gen.kubebuilder.io/version: v0.6.0
+    controller-gen.kubebuilder.io/version: v0.6.2
   creationTimestamp: null
   name: contourconfigurations.projectcontour.io
 spec:
@@ -910,7 +910,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    controller-gen.kubebuilder.io/version: v0.6.0
+    controller-gen.kubebuilder.io/version: v0.6.2
   creationTimestamp: null
   name: contourdeployments.projectcontour.io
 spec:
@@ -1835,7 +1835,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    controller-gen.kubebuilder.io/version: v0.6.0
+    controller-gen.kubebuilder.io/version: v0.6.2
   creationTimestamp: null
   name: extensionservices.projectcontour.io
 spec:
@@ -2236,7 +2236,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    controller-gen.kubebuilder.io/version: v0.6.0
+    controller-gen.kubebuilder.io/version: v0.6.2
   creationTimestamp: null
   name: httpproxies.projectcontour.io
 spec:
@@ -4197,7 +4197,7 @@ apiVersion: apiextensions.k8s.io/v1
 kind: CustomResourceDefinition
 metadata:
   annotations:
-    controller-gen.kubebuilder.io/version: v0.6.0
+    controller-gen.kubebuilder.io/version: v0.6.2
   creationTimestamp: null
   name: tlscertificatedelegations.projectcontour.io
 spec:

examples/contour/02-role-contour.yaml

@@ -50,52 +50,52 @@ rules:
   - list
   - watch
 - apiGroups:
-  - networking.k8s.io
+  - gateway.networking.k8s.io
   resources:
-  - ingressclasses
+  - gatewayclasses
+  - gateways
+  - httproutes
+  - tcproutes
+  - tlsroutes
+  - udproutes
   verbs:
   - get
   - list
   - watch
 - apiGroups:
-  - networking.k8s.io
+  - gateway.networking.k8s.io
   resources:
-  - ingresses
+  - gatewayclasses/status
+  - gateways/status
+  - httproutes/status
+  - tcproutes/status
+  - tlsroutes/status
+  - udproutes/status
   verbs:
-  - get
-  - list
-  - watch
+  - update
 - apiGroups:
   - networking.k8s.io
   resources:
-  - ingresses/status
+  - ingressclasses
   verbs:
-  - create
   - get
-  - update
+  - list
+  - watch
 - apiGroups:
-  - networking.x-k8s.io
+  - networking.k8s.io
   resources:
-  - gatewayclasses
-  - gateways
-  - httproutes
-  - tcproutes
-  - tlsroutes
-  - udproutes
+  - ingresses
   verbs:
   - get
   - list
   - watch
 - apiGroups:
-  - networking.x-k8s.io
+  - networking.k8s.io
   resources:
-  - gatewayclasses/status
-  - gateways/status
-  - httproutes/status
-  - tcproutes/status
-  - tlsroutes/status
-  - udproutes/status
+  - ingresses/status
   verbs:
+  - create
+  - get
   - update
 - apiGroups:
   - projectcontour.io